New dielectric materials of xSrTiO3-(1 - X)Ca(Mg 1/3Nb2/3)O3 ceramic system at microwave frequency

Jun Jie Wang, Cheng-Liang Huang

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The crystal structures and the microwave dielectric properties of the xSrTiO3-(1 - x)Ca(Mg1/3Nb2/3)O3 perovskite ceramic system have been investigated. In order to achieve a temperature-stable material, we studied a method of combining a positive temperature coefficient material with a negative one. SrTiO3 has dielectric properties of dielectric constant εr ∼ 205, Q × f value ∼ 4200 GHz and a large positive τf value ∼ 1700 ppm/°C. Ca(Mg1/3Nb2/3)O3 possesses high dielectric constant (εr ∼ 28), high quality factor (Q × f value ∼ 58,000 at 7 GHz) and negative τf value (- 48 ppm/°C). As the x value varies from 0.2 to 0.8, the xSrTiO 3-(1 - x)Ca(Mg1/3Nb2/3)O3 system has the dielectric properties as follows: 40 < εr < 123, 4600 < Q × f < 33,400 and - 23 < τf < 600. A new microwave dielectric material, 0.3SrTiO3-0.7Ca(Mg 1/3Nb2/3)O3, applicable in microwave devices is suggested and possesses the dielectric properties of a dielectric constant εr ∼ 46, a Q × f value ∼ 29,300 GHz (at 6.8 GHz) and a τf value ∼- 2 ppm/°C. A near-zero τf value can be achieved by adjusting the x value of xSrTiO3-(1 - x)Ca(Mg1/3Nb2/3)O3 ceramics.

Original languageEnglish
Pages (from-to)1280-1283
Number of pages4
JournalMaterials Letters
Volume60
Issue number9-10
DOIs
Publication statusPublished - 2006 May 1

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Microwave frequencies
microwave frequencies
Dielectric properties
dielectric properties
ceramics
Permittivity
permittivity
microwaves
Microwaves
Positive temperature coefficient
Microwave devices
Perovskite
Q factors
Crystal structure
adjusting
crystal structure
temperature
coefficients
Temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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title = "New dielectric materials of xSrTiO3-(1 - X)Ca(Mg 1/3Nb2/3)O3 ceramic system at microwave frequency",
abstract = "The crystal structures and the microwave dielectric properties of the xSrTiO3-(1 - x)Ca(Mg1/3Nb2/3)O3 perovskite ceramic system have been investigated. In order to achieve a temperature-stable material, we studied a method of combining a positive temperature coefficient material with a negative one. SrTiO3 has dielectric properties of dielectric constant εr ∼ 205, Q × f value ∼ 4200 GHz and a large positive τf value ∼ 1700 ppm/°C. Ca(Mg1/3Nb2/3)O3 possesses high dielectric constant (εr ∼ 28), high quality factor (Q × f value ∼ 58,000 at 7 GHz) and negative τf value (- 48 ppm/°C). As the x value varies from 0.2 to 0.8, the xSrTiO 3-(1 - x)Ca(Mg1/3Nb2/3)O3 system has the dielectric properties as follows: 40 < εr < 123, 4600 < Q × f < 33,400 and - 23 < τf < 600. A new microwave dielectric material, 0.3SrTiO3-0.7Ca(Mg 1/3Nb2/3)O3, applicable in microwave devices is suggested and possesses the dielectric properties of a dielectric constant εr ∼ 46, a Q × f value ∼ 29,300 GHz (at 6.8 GHz) and a τf value ∼- 2 ppm/°C. A near-zero τf value can be achieved by adjusting the x value of xSrTiO3-(1 - x)Ca(Mg1/3Nb2/3)O3 ceramics.",
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New dielectric materials of xSrTiO3-(1 - X)Ca(Mg 1/3Nb2/3)O3 ceramic system at microwave frequency. / Wang, Jun Jie; Huang, Cheng-Liang.

In: Materials Letters, Vol. 60, No. 9-10, 01.05.2006, p. 1280-1283.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Huang, Cheng-Liang

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N2 - The crystal structures and the microwave dielectric properties of the xSrTiO3-(1 - x)Ca(Mg1/3Nb2/3)O3 perovskite ceramic system have been investigated. In order to achieve a temperature-stable material, we studied a method of combining a positive temperature coefficient material with a negative one. SrTiO3 has dielectric properties of dielectric constant εr ∼ 205, Q × f value ∼ 4200 GHz and a large positive τf value ∼ 1700 ppm/°C. Ca(Mg1/3Nb2/3)O3 possesses high dielectric constant (εr ∼ 28), high quality factor (Q × f value ∼ 58,000 at 7 GHz) and negative τf value (- 48 ppm/°C). As the x value varies from 0.2 to 0.8, the xSrTiO 3-(1 - x)Ca(Mg1/3Nb2/3)O3 system has the dielectric properties as follows: 40 < εr < 123, 4600 < Q × f < 33,400 and - 23 < τf < 600. A new microwave dielectric material, 0.3SrTiO3-0.7Ca(Mg 1/3Nb2/3)O3, applicable in microwave devices is suggested and possesses the dielectric properties of a dielectric constant εr ∼ 46, a Q × f value ∼ 29,300 GHz (at 6.8 GHz) and a τf value ∼- 2 ppm/°C. A near-zero τf value can be achieved by adjusting the x value of xSrTiO3-(1 - x)Ca(Mg1/3Nb2/3)O3 ceramics.

AB - The crystal structures and the microwave dielectric properties of the xSrTiO3-(1 - x)Ca(Mg1/3Nb2/3)O3 perovskite ceramic system have been investigated. In order to achieve a temperature-stable material, we studied a method of combining a positive temperature coefficient material with a negative one. SrTiO3 has dielectric properties of dielectric constant εr ∼ 205, Q × f value ∼ 4200 GHz and a large positive τf value ∼ 1700 ppm/°C. Ca(Mg1/3Nb2/3)O3 possesses high dielectric constant (εr ∼ 28), high quality factor (Q × f value ∼ 58,000 at 7 GHz) and negative τf value (- 48 ppm/°C). As the x value varies from 0.2 to 0.8, the xSrTiO 3-(1 - x)Ca(Mg1/3Nb2/3)O3 system has the dielectric properties as follows: 40 < εr < 123, 4600 < Q × f < 33,400 and - 23 < τf < 600. A new microwave dielectric material, 0.3SrTiO3-0.7Ca(Mg 1/3Nb2/3)O3, applicable in microwave devices is suggested and possesses the dielectric properties of a dielectric constant εr ∼ 46, a Q × f value ∼ 29,300 GHz (at 6.8 GHz) and a τf value ∼- 2 ppm/°C. A near-zero τf value can be achieved by adjusting the x value of xSrTiO3-(1 - x)Ca(Mg1/3Nb2/3)O3 ceramics.

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